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Fire class description

SS 424 14 75

IEC

CENELEC

Node

F1

 

 

No demands. 

Cable spreads fire. 

 

F2

IEC 60332-1

EN 60332-1-2

Cable is flame retardant.  

A vertical 600 mm long cable will be burned with  

1 kW propane gas burner. Burning time is from 1 minute to 8 minutes, debending cable diameter.   

F3

 

 

Cable is flame retardant.  

Old swedish testing method, where the cable is installed to a vertical tube. Liquid fuel will be burned below this tube. Testing method is no longer valid.  

F4

 

 

Cables are installed to the vertical bunch in 3,5 m long ladder. The bunch will be burned from the bottom with 20 kW propane gas burner. The fire is not allowed to proceed over 2,5 m high and the cable bunch must be self-extinquishing. F4-class cables are used in places where fire spreading must be stopped. Mostly halogen freedom is supplementary demanding.

F4A F/R

IEC 60332-3-21

EN 60332-3-21

7 liter/m burning material, flame application time 40 minutes. (Over 35mm2 installation front and rear of the ladder)

F4A

IEC 60332-3-22

EN 60332-3-22

7 liter/m burning material, flame application time 40 minutes. (Under 35mm2 installation front of the ladder)

F4B

IEC 60332-3-23

EN 60332-3-23

3,5 liter/m burning material, flame application time 40 minutes.

F4C

IEC 60332-3-24

EN 60332-3-24

1,5 liter/m burning material, flame application time 20 minutes.

F4D

IEC 60332-3-25

EN 60332-3-25

0,5 liter/m burning material, flame application time 20 minutes.